Coring device
United States Patent 2252620

Inventors:
Long, Raleigh DE.
Publication Date:
08/12/1941
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Assignee:
FOHS OIL COMPANY
Primary Class:
175/81
Other Classes:
175/82, 175/239, 175/104, 175/98, 175/217
International Classes:
E21B49/06; E21B49/00